hibernate 继承映射union-subclass

<?xmlversion="1.0"?>

<!DOCTYPEhibernate-mappingPUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!-- Generated 2016-7-13 21:21:16 byHibernate Tools 3.4.0.CR1 -->

<hibernate-mappingpackage="com.lidongyang.hibernate">

   <classname="Person"table="PERSON">

       <idname="id"type="java.lang.Integer">

           <columnname="ID"/>

           <generatorclass="hilo"/>

       </id>

       <propertyname="name"type="java.lang.String">

           <columnname="NAME"/>

       </property>

       <propertyname="age"type="java.lang.Integer">

           <columnname="AGE"/>

       </property>

       <union-subclassname="Student"table="student">

            <propertyname="school"type="string"column="school"></property>

       </union-subclass>

       

      </class>

</hibernate-mapping>